To keep up with the city's rising population, Mayor Bill de Blasio implemented an affordable housing plan in 2014 that aims to preserve or create 200,000 units of housing with regulated rents by 2024. As of July 2017, 77,651 affordable units— with rents no higher than $3,461, depending on the household income — have been financed by the city.

Below are the 10 most expensive New York City neighborhoods, along with their median home sales prices, as of this fall:

3. Central Park South, Manhattan — $3.39 million

2. TriBeCa, Manhattan — $4.09 million

1. Flatiron District, Manhattan — $4.39 million

It's perhaps not shocking that Flatiron District, a Manhattan neighborhood that got its name from its famous skinny building, tops this list.

In Q2 of 2017, Flatiron ranked second. Its median sale price reached $4,399,375 in Q3, a 220% increase compared to the same time last year, according to PropertyShark.

One of the NYC's priciest homes for sale is in the Madison Square Park Tower, located a block away from the Flatiron building. As Curbed notes, the $48 million penthouse has panoramic views of the city, including the Chrysler Building, One World Trade Center, and the Empire State Building. The home also includes floor-to-ceiling glass walls, two other studio apartments for staff on the tower's lower floors, and two parking that normally cost $500,000 each.